import "./waves.css";

const context = "@@wavesContext";

function handleClick(el, binding) {
    function handle(e) {
        const customOpts = Object.assign({}, binding.value);
        const opts = Object.assign({
            ele: el, // 波纹作用元素
            type: "hit", // hit 点击位置扩散 center中心点扩展
            color: "rgba(0, 0, 0, 0.15)" // 波纹颜色
        },
        customOpts
        );
        const target = opts.ele;
        if (target) {
            target.style.position = "relative";
            target.style.overflow = "hidden";
            const rect = target.getBoundingClientRect();
            let ripple = target.querySelector(".waves-ripple");
            if (!ripple) {
                ripple = document.createElement("span");
                ripple.className = "waves-ripple";
                ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + "px";
                target.appendChild(ripple);
            } else {
                ripple.className = "waves-ripple";
            }
            switch (opts.type) {
                case "center":
                    ripple.style.top = rect.height / 2 - ripple.offsetHeight / 2 + "px";
                    ripple.style.left = rect.width / 2 - ripple.offsetWidth / 2 + "px";
                    break;
                default:
                    ripple.style.top =
            (e.pageY - rect.top - ripple.offsetHeight / 2 - document.documentElement.scrollTop ||
              document.body.scrollTop) + "px";
                    ripple.style.left =
            (e.pageX - rect.left - ripple.offsetWidth / 2 - document.documentElement.scrollLeft ||
              document.body.scrollLeft) + "px";
            }
            ripple.style.backgroundColor = opts.color;
            ripple.className = "waves-ripple z-active";
            return false;
        }
    }

    if (!el[context]) {
        el[context] = {
            removeHandle: handle
        };
    } else {
        el[context].removeHandle = handle;
    }

    return handle;
}

export default {
    bind(el, binding) {
        el.addEventListener("click", handleClick(el, binding), false);
    },
    update(el, binding) {
        el.removeEventListener("click", el[context].removeHandle, false);
        el.addEventListener("click", handleClick(el, binding), false);
    },
    unbind(el) {
        el.removeEventListener("click", el[context].removeHandle, false);
        el[context] = null;
        delete el[context];
    }
};
